ghc: internal error: getMBlock: mmap: Invalid argument (gi-gtk on armv7)

When trying to build gi-gtk-3.0.26 with ghc-8.4.4 on Fedora 30 armv7hl, ghc crashes like this:

[484 of 498] Compiling GI.Gtk.Functions ( GI/Gtk/Functions.hs, dist/build/GI/Gtk/Functions.o )
BUILDSTDERR: ghc: internal error: getMBlock: mmap: Invalid argument
BUILDSTDERR:     (GHC version 8.4.4 for arm_unknown_linux)
BUILDSTDERR:     Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
BUILDSTDERR: /var/tmp/rpm-tmp.McmHQu: line 52:  5271 Aborted                 (core dumped) ./Setup build

https://koji.fedoraproject.org/koji/taskinfo?taskID=33138502

gi-gtk built fine before on ghc-8.2.2 armv7.

Trac metadata

Trac field	Value
Version	8.4.4
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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